Large-size indoor shield model machine test platform suitable for coastal complex stratum

The invention discloses a large-size indoor shield model machine test platform suitable for a coastal complex stratum, the large-size indoor shield model machine test platform comprises a soil box, a digging and cutting mechanism, a deslagging mechanism, a propelling mechanism and a support moving platform, the left and right side walls of the soil box are provided with observation windows, and the rear side wall is provided with a shield tunneling hole for the digging and cutting mechanism to advance; the digging and cutting mechanism comprises a shield shell, a cutterhead located at the front end of the shield shell and a cutterhead driving assembly, a flange plate is arranged at the front end of the shield shell, and a soil bin partition plate is arranged on the shield shell close to the cutterhead, so that a soil bin is formed between the cutterhead and the soil bin partition plate; the deslagging mechanism comprises a front end connecting cutter head and a muck conveyor, the muck conveyor comprises a con