The invention discloses a sand screening and drying device for mortar production and processing. The sand screening and drying device comprises a device body, a second temperature sensor, a second heater, a drying room, a first temperature sensor, an outlet, a screening room, a first transmission motor, a first heater, a feed hopper, a first conveyor belt, a vibration motor, an operation display,an equipment room, a controller, a transmission shaft, a second transmission motor, a screening sieve, a conveyor belt and a material receiving bucket. The screening room is arranged on the middle portion in the device body, and the drying room is arranged on the left portion in the device body. The equipment room is arranged on the right portion in the device body, and the feed hopper is arrangedon the upper right portion of the device body. The first conveyor belt is arranged on the right portion in the device body and is located under the feed hopper, and the first transmission motor is arranged in the first conveyor belt. The first heater is disposed on the upper portion in the screening room, and the screening sieve is disposed on the middle portion of the screening room. The sand screening and drying device for mortar production and processing can better screen mortar for mortar production and processing, selected sand is high in consistency, and the sand screening efficiency isimproved.