Sciver smashed nine fours while opener Lauren Winfield-Hill bashed 55 from 43 balls.
Tammy Beaumont made 38, captain Heather Knight 27, Amy Jones 22 and Danni Wyatt 16 all contributed.
A late cameo from Emma Lamb, with 28 from 20 balls, then carried England to 310-9 that Bangladesh never looked like getting anywhere near.
Despite making a decent start to their innings as opener Shamima Sultana made 33 and number three Sharmin Akhter 81, Bangladesh fell well short in their 201 all out, with Sciver, Charlie Dean and Freya Davies all taking two wickets.
“Lauren is a naturally aggressive player,” Sciver told BBC Sport. “She and Tammy got us off to a great start.
“I wouldn’t want to be a selector and I don’t know what the order will be in our next warm-up game.”