A dig-grap type surface deposition sampler, comprised of a sampling bucket, a supporting system, a lifting system and a lengthen system; the sampling bucket is a cavity composed of a prism and a pyramid, the pyramid is formed by triangular cone flanks, the cone flanks are connected with side walls of the prism via a revolving drum, a revolving shaft and a shaft support, capable of revolving around the shaft; the supporting system is composed of a supporting rod, a bush, a first extending plate, a pressure-bearing rod and an upright rod, providing supporting effect to the sampling bucket; the lifting system is composed of a coupling rod, a lifting plate, a lifting rod, a second extending plate and a revolving rod, capable of controlling opening and closing of the sampling bucket via the supporting system, the lengthening system is composed of a lengthening bush and a lengthening lifting rod, capable of lengthening the bush and the lifting rod simultaneously which enables the sampler to adapt different water depth. This sampler has excellent performance with simple structure, convenient operation, low costs and portability and maintenance.