Variable-diameter sliding sleeve switch

The utility model provides a variable-diameter sliding sleeve switch. The variable-diameter sliding sleeve switch comprises an upper connector, a lower connector and a sliding sleeve, wherein the sliding sleeve can slide in the upper connector and the lower connector, the upper connector and the lower connector are fixedly connected in a sealing way, a first liquid outlet and a second liquid outlet are sequentially formed in the upper connector from top to bottom, the sliding sleeve is connected with the upper connector through a sliding sleeve shear pin, and the sliding sleeve shear pin is positioned at the upper end of the first liquid outlet; the middle part of the upper connector is also sequentially provided with an upper sealing ring, a lower sealing ring, a lining and an elastic piece from top to bottom in a sleeving way, the upper sealing ring is fixedly connected with the upper connector, the upper sealing ring is in sealing contact with the lower sealing ring, a sealing contact position of the upper sealing ring and the lower sealing ring is positioned in an outlet position of the second liquid outlet, the lower sealing ring is fixedly connected with the lining, the lining is fixedly connected with the elastic piece, and the elastic piece is fixedly connected with the lower connector. According to the variable-diameter sliding sleeve switch provided by the utility model, the structure is simple, the use is convenient, the aperture size of the first liquid outlet and the second liquid outlet can be changed according to different pressure during a using process, and the demands of plenty of sand fracturing construction are met.