There are two main reasons:

1. Tourists:

Because tourists are mostly young people and children, they have a greater demand for food, because they feel that they can bring some food to play inside, which can reduce their expenses on the one hand and solve the problem that they can eat their favorite food when they are hungry.

because the food brought by tourists must be what they usually like to eat, some tourists will think that the food inside is not suitable for them, so for tourists, the food forbidden to eat is a kind of trouble and incomprehension.

2. Disney:

For Disney staff, their responsibility is to protect the safety of tourists and the occurrence of hidden dangers in the places they manage. They should proceed from their own economic conditions. If all tourists bring their own food, their food sales will bring a lot of losses, their food will not be sold, and their interests will be reduced.

However, there are some aspects because tourists bring their own food, which will damage the environment inside, because some tourists are very unhygienic and litter their own food, which will increase the workload of staff.

Extended materials:

Do not engage in the following activities:

Sell or exchange goods or services, or display any goods or services for the purpose of sale or exchange, including but not limited to any form of tour service.

distribute and display printed matter or recordings in any form, or use any flags, banners or signs.

hold an assembly, a theme activity, a performance or a speech.

use the telescopic pole of camera/mobile phone/hand-held camera (such as selfie stick).

photography, video recording or audio recording, except for personal use and non-commercial purposes.

engage in any interview behavior without prior permission, including but not limited to photography, video recording, recording, interviewing tourists or cast members.

impersonating or playing any Disney role will affect other tourists or the operation of the park.

feed the animals in the park, including birds.

Fly kites and control remote control devices, such as drones and remote control toys.

any dangerous behavior or behavior that may hinder the operation of the park and any supporting facilities.

any act that violates the laws of the people's Republic of China.

Notes on Shanghai Disneyland-Paradise.