The utility model discloses an end blocking device for a linear lamp, which comprises an end housing for the linear lamp and a seal head, the seal head is in a cover shaped structure, the inner outline of the cover skirt of the seal head is the same as the outline of the end housing of the linear lamp, and slightly more than the outline of the end housing of the linear lamp; the cover skirt of the seal head is provided with small convex points entering from outside to inside, the end housing of the linear lamp is provided with small concave points or small holes entering from outside to inside when the seal head and the end housing of the linear lamp are buckled, the small concave points or small holes are at the position corresponding to that of the small convex points and have the same sizes with that of the convex points; and the seal head is clamped by the small convex points on the cover skirt and the small concave point or the small holes on the end housing of the linear lamp. Because the utility model adopts the mode of the combination clamping of the small convex points on the cover skirt and the small concave point or the small holes on the end housing of the linear lamp, the seal head is fixed at the end housing for the linear lamp, the seal head can be taken down by only applying a certain thrust along the directions of two ends of the lamp housing when dismounting and taking down the seal head, the fixing or dismounting needs not to rotate the screw, and the assembling and the dismounting are greatly convenient.