Novel sand filled bag

The invention relates to a novel sand filled bag. The novel sand filled bag comprises a sand bag body which is composed of an upper bag body and a lower bag body. The upper bag body and the lower bagbody are both made of a geotechnical cloth material, and the peripheral edges of the upper bag body and the lower bag body are fixedly connected in the circumferential direction. The upper bag body isprovided with a plurality of upper snap joint sets in the length direction of the sand bag body, the lower bag body is provided with a plurality of lower snap joint sets in the length direction of the sand bag body, and the positions of the upper snap joint sets are aligned to the positions of the lower snap joint sets up and down. The upper bag body is provided with a plurality of sand inlets, and the sand inlets are provided with sand inlet assemblies. Each sand inlet assembly comprises a connection base which is arranged on the corresponding sand inlet and provided with an external threadand further comprises a cor