so is this the reason his all cards are so heavy toload on both Chara maker and studio, does anyone knows how to fix this issue of his
So hey, you're quoting a person that needs mental help more than they need cards, but I kinda get what this one's about.
If a card is heavy to load, try adjusting the resolution of the textures in material editor and/or removing some accessories. May also want to just delete outfits you aren't using. Also try playing with different shaders. A lot of cards that use gacha ports end up having really bloated sizes because of the texture atlases on accessories being far larger than they should be (opening up the MainTex in photoshop or some other image editor and cutting it to JUST the accessory helps a lot).
For textures, you can use something like PNG Gauntlet to reduce the size of textures. Careful with skin overlays and normalmaps, though; sometimes it destroys their details.